Topic: Manufacturing
Which is the correct sequence of machining operations to be performed to finish a through hole of large diameter?
- A. Drilling, reaming, boring
- B. Drilling, boring, reaming
- C. Boring, drilling, reaming
- D. Boring, reaming, drilling
Answer: B. Drilling, boring, reaming
Explanation: The standard sequence to produce a large, precise hole is to first drill a pilot hole, then use a boring tool to enlarge it and align it accurately, and finally use a reamer to achieve the required dimensional accuracy and surface finish.